Hydraulic pump



1941- A. F. HABENICHT I HYDRAULIC PUMP Filed April 30, 1937 3Sheets-Sheet 1 A. F. HABENICHT 2,232,449

HYDRAULIC PUMP Filed April 30, 1937 Fgb. 18, 1941.

3 Sheets-Sheet 2 Feb. is, 1941 A. F. HABENICHT HYDRAULIC PUMP FiledApril 50, 19157 3 Sheets-Sheet 3 I v W W/f/Q W w- Eli/ z zzerzz'czz;

Patented Feb. 18, 1941 UNITED STATES PATENT OFFICE HYDRAULIC PUMP AugustF. Habenicht, Tinley Park, 111. Application April 30, 1937, Serial No.140,061

1 Claim. (01. 121-164) This invention relates to a pump and moreparticularly to a valve-controlled hydraulic pump. I An object of theinvention is to provide a hydraulic pump in which liquid under pressureis forced alternately into the two ends of cylinders to effect anoscillating movement of the pump rod.

Another object is to provide cylinders and pump means in such anarrangement as to actuate the pump rod without side strain and atconstant pressure throughout its stroke in either direction.

Another object is to provide a quick acting valve mechanism whichoperates automatically to change the courseof the liquidto the oppositeend of the cylinder when the piston approaches an end of its stroke. Aspecific object is to provide valve-control mechanism in which springmeans is provided for quickly moving the valve from one position toanother. Other specific objects will appear as the specificationproceeds.

An embodiment of the invention is illustrated by the accompanyingdrawings, in which- Figure 1 is a view in side elevation of the improvedpump, the well pipe being shown broken and partly in section; Fig. 2, abroken enlarged view in side elevation of the pump operating mechanism,the parts being shown in position for beginning upward stroke of thepistons; Fig. 3,

a sectional view of the upper portion of the cylinders, the View beingtaken as indicated at line 3 of Fig. 2; and Fig. 4, a detail sectionalview of the valve device at the lower end of the pump rod.

As illustrated, A designates lifting mechanism including a pump rod andpipe; B, a pair of cylinders having pistons attached to the pump rod; C,a pump for delivering liquid under pressure; 'D, a valve for directingliquid to one or the other end of the cylinders; and E, automatic avalve control mechanism.

My improved pump maybe used for raising any kind of liquid and invarious situations.

The illustrations given show the pump as adapted to draw water or oilupwardly from a lower portion of the well pipe ID. A pump pipe I Iextends downwardly within the well pipe and has an inlet valve I2 at itsbottom, this Valve being adapted to pass liquid only into pipe ll.Upwards of valvel2 is a bucket l3 which slidably engages the insidewalls of pipe H equipped with a valve l4 which willpass liquid onlyupwardly into the interiorv of bucket l3. At its upper portion bucket I3is provided with holes l5 to allow the liquid to pass out into pipe ll,

and is The lower end of pump rod I6 is attached to bucket l3, and uponup and down movement of this rod liquid is raised in pipe II and causedto pass out through outlet opening II. This much of the mechanism iswell known, and any equivalent means may be substituted therefor. Ifdesired, the bucket l3 may be of the double-acting cylinder type.

' In the embodiment shown two cylinders l1 and H! are employed, thoughany number of cylinders may be used as are desired. However, thecylinders should 'be so located about the pump rod that this rod will bethe center of the forces exerted by the pistons of all of the cylinders.In such an arrangement the pump rod will be given a straight pull andside strain on the rod Will be eliminated. As here shown, cylinder I1 ison one side of the pump rod and cylinder IS on the other. Thesecylinders are secured at their bottom ends by a cross piece H) which mayextend about well pipe III and contain openings through which thecylinders are received. This cross piece contains an interior passage 20which communicates with the interior of both cylinders and communicatesalso with the conduit 2| which leads to the valve D.

A top cross piece 22 secures and supports the cylinders at their topends. This piece contains openings through which the cylinders and pipeH are received, and contains also a passage 23 which communicates witheach of cylinders l1 and I3 and also with a conduit 24 leading to thevalve D.

Cylinders H and I8 are equipped with pistons 25 and 26, respectively.Piston rod 21 of piston 25 extends through the closure 28 of cylinder I1 and is connected with the one end of the cross member '29, and pistonrod 30 of piston 26 extends through the closure 3| of cylinder [8 andvantage when there are several wells to be pumped within a relativelysmall area. The inlet 33 of pump C is connected by pipe 34 with areservoir 35 which contains oil or any suitable liquid for use in thepump; and the outlet 36 is connected by pipe 31, of any desired length,to the valve D. A housing 38 is attached to pipe 31 and has its interiorchamber 39 in communication with the interior of this pipe. The purposeof this housing is to provide an air cushion for the liquid dischargedfrom pump 0'.

The valve D comprises a housing of the general shape shown in Figs. 1and 2 of the drawings. Pipe 31, through which liquid under pressure isdelivered b the pump C, connects with the middle portion of housing 5!).Conduit 24 leading from the top of the cylinders connects with hOllSiIlg50 upward of its middle portion, and conduit 2| leading from the lowerend of the cylinders connects with housing 5|] downward ofv its middleportion. Pipes 5| and 52 connect respectively with the upper and lowerends of housing 50 and lead to pipe 53 connected with the inlet 33 ofpump C.

Within housing 59 is a piston member 54 which is equipped with spacedrings or washers 55 and 56 adapted to slide up and down in contact withthe walls of housing 5|]. The stem 51 of the piston member extendsthrough the upper closure of the housing and has its upper end connectedwith the va1ve-control mechanism later to be described.

When the piston member 54 is in lower position, as shown in Fig. 2, apassage is open between pipe 31 and conduit 2|, and another passage isopen between conduit 24 and pipe 5|. When this member is moved upwardly,pipe 31 is opened to conduit 24 and conduit 2| is opened to pipe 52.

The valve control mechanism E comprises a holding member 63 having anupright bar 6| equipped with spaced arcuate notches 62 on one side. Atthe top and bottom of bar 6| are the laterally extending arms 63 and 64having openings in their ends. Member is secured to the top of valvestem 51 and is adapted to move vertically to change the valve position.

A frame member 22 which may be merely an extension of the cross piece22, has mounted thereon a roller 65 which engages one side of bar Bl.The other side of bar 6| containing notches 62 is engaged by an arm 66pivotally mounted on frame member 22 and having a roller 61 at its endwhich roller is adapted to fit into the arcuate notches 62. This arm ispressed by spring 68 into engagement with the notched side of bar 6!.Arm 6G is so positioned as to engage the upper of notches 62 when thepiston member 54 is in lower position as shown in Fig. 2. -When thepiston member is moved to its upper position, roller 31 of lever 66engages the lower of notches 62.

Each of arms 63 and 64 on holding member 60 receives a spool-like sleeve10 which is vertically slidable and contains a central opening. Acompression spring 1| extends between adjacent ends of sleeves 15, andthe control rod 12 extends through each of sleeves 10 and through spring1|. Rod 12 should be at least as long. as the longest stroke desired. Atits upper portion this red isequipped with a lug 13 adjustably securedto the rod, and at its lower portion rod 12 is equipped with a secondlug 14 also adjustably secured to the rod and adapted to be fixed atsome desired point along its length.

For actuating rod 12, an arm 15 is secured to cross piece 29 and isadapted to support the rod; this arm may be fixedly attached to rod 12if so desired- By this arrangement, when the pistons 25 and 26 move upand down, the rod 12 will move longitudinally with the same strokecharacteristics.

Operation Assuming that the pump is started with the parts in theposition shown in Fig. 2, operation of rotary pump C causes liquid (oil,water, or other liquid) to be drawn from reservoir 35 and forced throughthe central portion of valve housing 50, through conduit 2|, and intothe lower ends of cylinders l1 and I8, the liquid being distributedevenly to each of these cylinders through the interconnecting passage 20in cross piece l9. Pressure on the underside of pistons 25 and 26 causesthese pistons to move upwardly within the cylinders, raising the pumprod IE, to draw water upwardly within pipe I A constant force urges thepistons straight upwardly until they approach the end of their stroke.Since the rod 12 moves in unison with the piston rods, this rod willmove upwardly, sliding within sleeves 10 and spring 1|. However, afterthis rod has moved upwardly so that lug 14 impinges against the lowersleeve 10, this sleeve will be caused to move upwardly within arm 64, soas to compress spring 1|. Then when lower sleeve 10 has reached the endof its travel within arm 64, member 80 will itself be caused to moveupwardly with rod 12. When this occurs, the roller 61 at the end ofspring pressed arm 66 will be caused to disengage the upper of notches62. Once the engagement with this upper notch is broken, spring 1|, nowunder compression, operates to move member 6|] quickly upwardly untilthe lower of notches 62 is engaged by spring pressed arm 66.

This quick movement of the valve member through the action of spring 1|operates to throw the valve into its other position in which liquidunder pressure from pipe 31 is directed through conduit 24 to the upperend of the cylinders, the liquid being evenly distributed to each of thecylinders by the passage 23 in cross piece 22. Now liquid under pressureis being delivered to the upper side of pistons 25 and 26 and thesepistons are caused to move downwardly. The liquid beneath the pistons isallowed to pass through conduit 2| and pipes 52 and. 53 to the inlet ofthe pump C. As the pistons approach the end of their downward stroke,the upper lug 13 on rod 12 impinges the uppermost of sleeves 10 andmoves this sleeve downwardly within arm 63 to compress spring 1|. Whenthis sleeve can move no farther within arm 63, holding member BI] ismoved downwardly todisengage arm 66 from the lowermost of notches 62,after which spring 1| quickly expands to move member 60 and stem 51downwardly to again change the position of the valve. This cycle is thenrepeated. Upon upward stroke of the pistons the liquid above the pistonis allowed to return through conduit 24 and pipes 5| and 53 to theintake of the rotary pump C.

It will be observed that the improved pump may be made to operate at anydesired length of stroke, the length of the stroke being limited only bythe length of the cylinders. To shorten the length of stroke it isnecessary only to move the adjustable lug 14 upwardly on rod 12, so thatthis lug will impinge sleeve 10 to reverse the direction of flow beforethe piston has been raised so high.

The provision of the air. chamber 39 contributes greatly to thesmoothness with which the improved pump operates. Though the valve ischanged quickly at the end of each stroke, an instant of time isrequired for the pistons and pump rod to change the direction of theirmotion, and during this time the flow of liquid from the pressure pump Cwill be interrupted. Air chamber 39 provides a cushion which takes up asmall quantity of liquid during this interruption and allows theoperation to continue without excess pressure being built up and withoutjerk or halt in the operation of the pump mechanism.

It is understood that many changes may be made in the specificconstruction described without departing from the spirit of theinvention. The foregoing detailed description has been given forclearness of understanding only, and no unnecessary limitations shouldbe understood therefrom.

I claim:

In a valve controlled hydraulic motor of the character set forth, valvecontrol mechanism ineluding a member attached to the stem of the valveand having spaced arms, aligned sleeves extending through said arms, acompression spring between said arms and having its ends engaging saidsleeves, the inner ends of said sleeves having projections engaging saidarms, a rod extending through said sleeves and spring and equipped withspaced lugs for engaging the remote ends of said sleeves to compresssaid spring as said rod is moved longitudinally into extreme position, abar connecting said arms together and containing notches, and a springpressed holding member for cooperation with said notches.

AUGUST F. HABENICHT.

